Compare 75/21 and 90/6
1st number: 3 12/21, 2nd number: 15 0/6
75/21 is smaller than 90/6
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
75/21 = 75 × 2/21 × 2 = 150/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
90/6 = 90 × 7/6 × 7 = 630/42 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 150/42 < 630/42 or 75/21 < 90/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/42 and 90/6 75/21 and 90/12 75/63 and 90/6 75/21 and 90/18 75/21 and 90/30 75/21 and 90/42